LocalDns.hxx

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#if !defined(RESIP_LOCAL_DNS_HXX)
#define RESIP_LOCAL_DNS_HXX
 
#include <map>
#include "rutil/Data.hxx"
#include "rutil/dns/ExternalDns.hxx"
 
extern "C"
{
struct ares_channeldata;
}
 
 
namespace resip
{
class LocalDns : public ExternalDns
{
   public:
      LocalDns();
      virtual ~LocalDns();
 
      virtual int init(); 
      virtual unsigned int getTimeTillNextProcessMS();
      virtual void buildFdSet(fd_set& read, fd_set& write, int& size);
      virtual void process(fd_set& read, fd_set& write);
 
      virtual void freeResult(ExternalDnsRawResult /* res */) {}
      virtual void freeResult(ExternalDnsHostResult /* res */) {}
 
      void lookup(const char* target, unsigned short type, ExternalDnsHandler* handler, void* userData);
 
      virtual void lookupARecords(const char* target, ExternalDnsHandler* handler, void* userData) {}
      virtual void lookupAAAARecords(const char* target, ExternalDnsHandler* handler, void* userData) {}
      virtual void lookupNAPTR(const char* target, ExternalDnsHandler* handler, void* userData) {}
      virtual void lookupSRV(const char* target, ExternalDnsHandler* handler, void* userData) {}
      virtual char* errorMessage(long errorCode) 
      {
         const char* msg = "Local Dns";
 
         int len = (int)strlen(msg);
         char* errorString = new char[len+1];
 
         strncpy(errorString, msg, len);
         errorString[len] = '\0';
         return errorString;
      }
 
   private:
 
       struct ares_channeldata* mChannel;
 
      typedef std::pair<ExternalDnsHandler*, void*> Payload;
      static ExternalDnsRawResult makeRawResult(void *arg, int status, unsigned char *abuf, int alen);
      static ExternalDnsHandler* getHandler(void* arg);
 
      static void localCallback(void *arg, int status, unsigned char* abuf, int alen);
 
      static void message(const char* file, unsigned char* buf, int& len);
      static std::map<Data, Data> files;
      static Data mTarget;
};
   
}
 
#endif
 
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